Grinding machine



Janv 16, 1951 E. c. OLIVER 2,538,532

GRINDING MACHINE Filed Deo. 5, 1945 5 Sheets-Sheet l 159 157 15g y 4- /Q 151 151 //96/M\ f/ Q E. C. OLIVER GRINDING MACHINE Jan. 16, 1951 5 sheets-sheet 2 INVENTQR.

Filed Deo. 3, 1945 EN /..T L T H @A 5 D D EN /l E. C OLIVER GRINDING MACHINE Jan. 16, 1951 5 Sheets-Sheet 3 Filed Deo. 3, 1945 yWIM mi? Q/ n 74@ INVENTOR EDE EULA/5R v BY l ATTORNEY Jan. 16, 1951 E. c. OLIVER GRINDING MACHINE 5 Sheets-Sheet 4 Filed Dec. 3, 1945 Jan. 16, 1951 E. c. OLIVER 2,538,532

GRINDING MACHINE Filed Dec. 5, l1945 5 Sheets-Sheet 5 1 QMHIMW/ INVENTOR. Elm L". DLn/ER Q Mf/ ATTORNEY Patented Jan. 16, 1951 GRINDING MACHINE Eau c. oliver, Adrian, Mich.; Genevieve n. oliver,

executrii; of said Edd C. Oliver, deceased, assignor to Genevieve R. Oliver, Adrian, Mich.

Application December 3, 1945,l Serial No. 632,370

8 Claims.

This invention relates to a grinding machine and more particularly to a grinding machine embodying a uniplanar grinding wheel surface for forming or coniigurating machine tool bits to prel, determined proles and for re-sharpening formed tool bits to maintain their pre-determined proles as may be required for various types of cutting tools or bits used in machine operations.

The invention comprehends the provision of a grinding machine arranged and adapted to form templates of tool bit congurations or` proles whereby a template so formed may be subsequently utilized to produce form tool bits therefrom as well as to resharpen and recongurate worn tool bits to their properproles.

The invention embraces a machine arranged to produce templates, and which embodies gaging means for determining the proper relative positions of wheel dressing members, templates and forming tools carried by suitable fixtures or holders.

An object of the invention resides in a grinding machine embodying a rotary grinding medium arranged to present a plurality of stations, zones or positions for performing'template congurating and tool bit forming and re-sharpening operations.

Another object of the invention resides in the provision of a grinding machine embodying a reversible grinding wheel, the machine being provided with a plurality of stations or zones-for accomplishing grinding operations.

Another object of the invention is the provision of a grinding machine embodying means for performing grinding operations at different stations or zones whereby tools of different configurations or of different relief angularities may be ground or formed without the necessity of'intermediate adjustments.

Another object of the invention resides in the provision of simple, yet effective means for ad'- justing the relative position of the grinding medium to effect proper grindingY -operations as well as to compensate for wear of the grinding medium.

Another object of the invention is' the provision of simple tool holder supporting means which may portion of the machine, certain parts being be adjusted and locked in proper operativeA position.

Still another object of the invention is the provision of a tool supporting means associated with a grinding medium in conjunction with adjusting j means to maintain the grinding surface and the cutting edge of la form tool bit in proper relation to Aperform accurate grinding operations.

juse on the gaging means; l l

Figure '7 is a detail view illustrating a method of dressing the grinding wheel preparatory to al 2 A further object of the invention resides in the provision of tool holder supporting means associated with a grinding machine and of such a nature that the various angles of relief maybe formed on tool bits.

A further object of the invention resides in the. provision of a grinding machine arranged andv adapted to configurate or produce a template from a master tool in which the template form is en'-v larged in comparison with the size of the master tool bit cutting configuration and wherein such enlarged template may be utilized in forming a tool bit or for re-sharpening a worn tool bit whereby a high degree of accuracy of tool bit prole is obtained.

Still another object of the invention is the pro,-`

Further objects and advantages are Within the *A scope of this invention such as relate to the arrangement, operation andfunction of the related elements of the structure, to various details of construction and to combination of parts, ele` ments per se, and to economies of manufacture and numerous other features as will be apparent` from a consideration of the specication and drawing of a form of the invention, which may be preferred, in which: f

Figure 1 is a front elevation view of the grinding machine of myinvention;

Figure 2 is a side elevational View of the grind- Y ing machine;

Figure 3 is a top plan View of the grinding mal chine;

Figure 4 is a detail sectional View taken substantially on the line 4-4 of Figure 1;

Figure 5 is a front elevational view of the upperv shown in section;

lFigure 6 is a fragmentary elevational view of the gaging means forming a component of the invention illustrating a fixture for mounting a grinding wheel dressing-device in position template forming operation; y

Figure 8 is a View illustrating a tool bitand for" positioned upon the gaging;4

Figure 9 is a fragmentary view illustrating a wheel dressing tool and fixture therefor arranged upon the gaging device and utilized for wheel dressing prior to grinding tool bits;

Figure 10 is a side elevational View of a forward portion of the machine illustrating the Wheel dressing tool in engagement with the grinding wheelzfor performing a wheell dressing spera-v tion preparatory to a tool bit'- forming orY resharpening operation;

Figure 11 is an elevational view of the forward portion of the machine illustrating a tool. bit. holder, tool bit and template assembly illustrating the position of these elements. during a. tool. bit forming or grinding operation; Y

Figure 12 is a top plan view ofanadjusting means forming a componentof the invention;

Figure 13 is a horizontal sectional view taken substantially on the line l3-l3 of Figure- 2';

Figure 14 is a Vertical sectional View taken substantially` onz theY line. Il--lli-- of" Figure' 13;

Figure 15 is a rear.v elevational. View" of the; uppenpart o'fthe'grnding machine;

Figure 1 6: is a fragmentaryM detail. sectionaly View illustrating an adjustmem;r and locking means for ai. component element. of. the grinding machine constructions:

Figure: 1711s an enlarged detail sectional View` taken substantially on the line lfllfof Figure-,3 v

Figure l-'8 is'a'fiagmentary detaiisectional'view showingfa portion-.ofthe adiustingmeans for the grinding. wheel spindle;

Figure 19: is a fragmentary detail sectional; View showing other.- components ofy the: grinding wheel spindle adjusting means;

Figure 20r1is=arear elevational view offthel tool and'template` holder or fixture shown in: Figure' 2, and

Figure .21 is a top:v plan View' of the tool and template holder.

While I have illustrated` the grinding machine oft my inventionand thecomponentsv thereof as especially arranged and adapted for the production of tool bit templatesv and the initialformation of and resharp'ening ofl formed tool bits, it is` tol be understood" that I` contemplatek the utilization` of my invention for any purpose wherever the same may be found to have utility.

Referring tothe drawingsr-indetail', the grinding machine is inclusive ofV a.y frame I, which,v in the embodiment illustrated, is inclusive of a pedestal or base llV upon which is: mounted. an upperV frameportion l2, which. issecuredl in place by means of screws le. The base III. isoff hollow configuration. and isdivided. by means of avertical' wail' I'T which, with the outer walls` of, the. base,.forms apair. of. fluid chambersor reservoirs I9` and 2'0. The reservoir l9` forms a settling chamber functioning to` permitabraded or comminuted materials entrained witha iiuidfor cool,-` ant tosettle to the lower portioneof the reservoir las indicated at. 2l. A suitable opening. isI provided in a wall of the chamber I9 for cleaning purposes, the opening being normally closed by acover 23..` The wall Il terminatesin its verti cal dimension as indicatedfat 22, forming a spill- Way for passage of uidfromchamber i9 into chamber 2G and determines the level. of coolant or. fluid in.theprimar.y reservoir i9. Thus when thelevel.I of coolantin.reservoir. i9. is above'the edge of the wall Il, the excessamount of coolant willow into the supplemental reservoirY 20 as indicated in-l the direction of the arrows in Fig.- ure 1.

Disposed in the supplement-a1 reservoir or chamber 2e is a fluid circulating pump 25 which is Preferably of a reversible type having an axial or central inlet opening 25 and a radial discharge outlet 2. The discharge outlet is connected to a rigid pipe or tube 29 which extends upwardly and which is providedv at its upper extremity with a coupling 30 tofwhich is connected a tube 3i formed of flexible material.s the'- tubes: 2S- and 3l being arranged to convey coolant orV fluid from the pump 25 to the grinding wheel in a manner to. hev hereinafter explained. The coolant or fluid performs, among others, the functions of cooling' the: grinding wheelvand the tool bit or other instrumentality being ground, and entrains-a'nd conveys: the cuttings or abraded material resulting from grinding operations away from the grinding zones.

The. upper portie-n of the frame pedestal is conflgurated to form a trough or flared receptacle 311` boundedY byy 'flanges' or walls. 35a Positioned immediately beneath the frame portion` |-2` is a chamber 36 bounded.. laterally. by. walls 3l and da as. shown. in- Figure, l andby. front. andy rearl wall. portions 39.- and 4@ as shown in; vFigure. 2; Theswalls 3l. and.' 38.- are formed. with projecting. baflles or shields` il and Yi12.- which extend down.-

wardly, as. show-n in. Figure l, to-screen or baiileopenings 4.3. and M through which fluid-may pass from chamber 3@ into. chamber 3B andy thence through opening i5 in thelower. wall-A of chamber 35- into the primary reservoir 1.9.. The chamber 34. also serves` to retain. some. of. the. abraded material. entrained in thecoolant fluid inthe same manner as thisfunction islperformedz bythe primary reservoir te ashereinbefore explained.

The frame member His-integrally formed with a portionlillY of semi-cylindrical congurationwhich mates with. a similarconguration formedonv a capor saddle 55., these configurationsform.-v

ing together a cylindrical bore adapted to accommodate a cylindrical` sleeve or. quill-:5L Arranged within eachv end. of.. cylindrical.. member 5.4 are. anti-friction bearings 53. and.54\vhich,.as illus.-

trated, are of. the balltypebut.whichmay'beof.

any. suitabletype.. The bearings 53 and Emretatably supporta shaft or spindle 5l. Project; ing fonwar-.dly ofbearingsrh isataperedportion 58 integrally formed as apart-oi the-spindlel.;

thetapered portionsupporting. afltting. 59 vcar-ryingthegrinding wheel-constructiom Tnthe em,- bodiment illustrated.y the grinding. mediuml or wheel B is.- of annular. configuration. and'. is

bonded. to a, base. BI., thev latter. being` secured-tol thefitting 5.9.. by means-ot screws 6.2'.Y This.I form.

ashereinafter explained. There is, provided al fluid. sealing. devieeof conventional construc-l tion.disposedbetween-.thexttingand-the bear'-4 ingr Sito. maintain lubricant.v in thebearings and. to prevent the entrance of fluid coolant into thef bearings.. The member. llywhich-` is-'secured;to

oneend of. the. sleevet, is provided with. a plu-e rality of circumferentially spaced recesses-adapt ed to contain expansive coil springs 68 for the 'purposeof biasing the thrustthroughthe bear.-

ings 54, shaft-5l. and bearings: 5.3;., so that.` the position of the grinding wheel will-be determined4 by the thrust plate l2 secured to the other; endof. sleeve 5I.

The spindle: orV shaft-.- 5.7:. is-y provided. ais-its:y clp-- In. the present embodiment, the. face. 64.

extension .51 of the spindle or shaft 51. pulley 69 is connected by means of a `pair of D posite'end with'an extension 61 of reduced diamreter which is suitably splined to receive a pulley construction 59 arranged for slidable movement along the splined extension 61 and functions to rotate the spindle 51. The pulley construction 69 is .provided with oppositely extending hubs and 1| to insure a large bearing area. The extension 01 and pulley 59 are disposed Within a closure or housing 13 which is provided with .a cap 14 as shown in Figure 4, the housing 13 4and .cap 1li being secured to the portion 50 of lthe frame l2 by means of screws 15. The housing 13 and cap 14 are respectively formed to accommodate the outer races of antifriction or ball bearings 16 and 11 which serve to journally sup'- port the pulley 09 and to lend stability to the The V-shaped belts or power transmission means 80 which take over a driving pulley 8| carried upon a motor shaft 92 of the driving motor 83. The

motor shaft 82 isV also arranged to support a second pulley 94 which is connected by means of a V-shaped belt85 or other suitable means to a pulley 86 which drives the rotor 28 of the cool- ;ant circulating pump 25. By this arrangement themotor 33 serves to drive the' grinding wheel 60 through the medium of pulleys 69, 8|, and belts 80, and to drive the uid circulating pump mechanism by means of pulleys 84 and 86 connected together by power conveying belt 85. The belts and pulleys are housed within a removable metal closure or shroud 81 as shown in Figure 2.

One of the major features of the present invention is the provision of .a plurality of stations or zones for effecting tool bit grinding and template forming operations. The grinding wheelV 60 is enclosed in a housing 89 which is secured to a plate 90 forming the rear wall of the housing, the plate 90 being secured to the frame portion |2 of the machine by suitable means (not shown).

The housing 09 is secured to the plate 90 by means of screws 92. As particularly shown in Figure 1, the housing is configurated with slots or openings 93 and 94 exposing certain areas of the grinding wheel surface which provide grinding zones or stations.

The flexible tube 3| for conveying the coolant terminates in a fitting 95 as shown in Figure 4 which is connected with a tubular fitting 96 carried by the housing 89, the latterbeing formed at its upper portion with a hollowconfiguration or manifold 91 to receive and redistribute the coolant or uid. The chamber 91 is inclusive of abutments or projections 98 and 99 as shown in Figure 1, with which a movable vane or valve |00 is adapted for cooperation to selectively divert or direct the fluid tothe grinding Zones 93 l and 94. The vane |00 is secured to a stub shaft |0| as shown in Figure 4, the stub shaft being provided with a finger piece or manipulating means |02 for shifting the position of the fluid diverter or vane |00. AS viewed in Figure 1, the vane is in the position to direct the coolant or fluid entering the manifold 91 from tube 93 to the grinding zone 93. If the manipulating knob y|02 isturned in a counter-clockwise direction to bring the upper portion of the Vane |00 into engagement with the abutment 98, the coolant or fluid will be directed to the grinding zone 94. It should be noted that the edge Walls of manifold 91 which form the upper boundaries of the grinding zones 93 and 94 are canted in a direction toward the' grinding wheel so as to direct the coolant or uid into the area or zone` vof the grinding wheel surface at which grinding opera tions take place. l

In the present embodiment of the invention I have illustrated two grinding stations. in conjunction with dual supporting means for tool carrying fixtures, holdersv or the like. To this end, there is secured to each side of frame portion I2 members |05 secured thereto by screws or other suitable means (not shown), each of said members beingformed with a recess to -accommodate a supporting means |01 and |08 adapted to accommodate a tool holder or other instrumentality. Each of the supporting means |01 and |08 comprises a substantially semi-annularly shaped member'||0, the upper portion of each member ||0 being of slightly lesser thickness than the remainder of the body of the supporting means as illustrated in Figure 16.

The larger portion of each member |.I0 is formed with a serrated or toothed portion ||4, each serrated portion adapted for enmeshment with a pinion or gear ||5 contained in each recess ||6 formed in members |05. Each pinion ||5 is fixedly secured upon a shaft ||1 which is jour,- naled in suitable aligned bores or cylindrical openings formed in frame portion I2 and members |05. Each shaft ||1 has a projecting portion upon which is mounted a knurled manipulating 'knob ||9=which is secured to the shaft by means of a key |20 or other suitable means. Rotation of the knob 9 will rotate the shaft ||1 and pinion H5, and as pinion ||5 -is enmeshed with the\too`th portion ||4 of member H0, the latter may be adjustedto change the relative position thereof with respect to trie grindingrwheel for purposesV to be hereinafter explained. y Y

Each of the manipulating knobs ||9 is provided with a peripheral portion bearing a series of indicia |22 adapted to cooperate with an index line |23 which is engraved or impressed in an arm or index member |24. Each arm or pawl |24 is pivotally supported upon the tenon portion |25' of a threaded member |26 which is rmounted in r member |05 as shown in Figures 13 and 14. Thel tenon |25 -terminates in head portion |21 servingvto maintain arm |24 in assembled position. Surrounding each of the shafts ||1 and disposed between each manipulating knob ||9 and members |05 is a ratchet or toothed wheel |30 which is secured to knob |9 by means of dowels |3|. Each 'of the indices |22 is in alignment with a vradial side of each of the ratchet teeth |32 formed on the periphery of wheel |30, and the space between each pair of indices representing a circumferential distance of movement of members |0 of one degree.

Thus if the operator wishes to secure a ve degree adjustment of one of the supporting means |01 or |08,'he simply manually lifts or elevates the index arm |24 and rotates the pinion ||5 through manipulation of knob ||9 until the indicia |22 indicating 5 degrees is in registration with index line |23, after which the arm |24 is released and permitted to engage the ratchet wheel. The pawl tooth |33 formed on arm |24 elects an accurate indexing of pinion ||5 and hence the `supporting means |01 by engaging the lateral side of one of the teeth |32 of ratchet wheel |30 which is in the proper position to be engaged by the tooth |33.

Locking or clamping means are provided for -each of members 0 for securing the samein adjusted. position. `As will be more clearly seen lfrom .Figure 16, members |05 are suitably re- 1|05 'are formed with'alignedropenings-.wliich vaci 'oommodate Yand receive transversely extending shafts E139 as rparticularly :fshown iin Figures f5 and -1-.3,:each 'of which lis Iprovid-ed 'a cam portion or c'onguration |40 :which 5Aarranged .adjacentfthe `brake shoesl.' IEach ofrthe'shats `|391projects externally of members =||J5,.the Vfproij-ectingzportions loeing adaptedto A`receive manipulating *handles or levers '-l421which are --secured tos'haits i liby' means' of keys I|43sand1set screws Mij fEach o'f the larms YM12 is provided with fa vmanipulating `knolo V:|45 ifo-r 'ease A of manipulation voilfthelocling means. 'Fromtheia'bove it Yvvillbe `apparent vthat 'the :machine operator may lock or release the:closeifrictionalengagement of the brake shoe 21'36iwithther inner curved surfaces r'of rmeinbens lflll'b-ytsimply .manipulatingy or partially vrotating :arms l |42.

`fEach= oflthe supporting lmeans 1|"61 and 5'H18 l-are provided rwith' alledge por-tion H548 which supports hall-like'coniiguraticn llg'rvvhichfforms a mounting-Or'suppOTt for iixturesf'or toollitiholders-the construction and use of which Will be hereinafter :described vThis ledge Lportion |48 lterminatesi'forwardiyin'a gage. surface or-straightfedge Jillian'd-theupper extremity of'portionJH oieach i supportingmeansi-terminatesfforwardly inf-a gage `surface or `straight#edge il, "the ffunctionsof `these :surfaces''be'ing hereinafter fexplained.

' The fmachinel of lmyinventionis #provided with afgaging means foriproperl-ysetting v'fheelldress- Ving devices, V-tool bit blanks orm i tools iin suitable holders or iiiitures. 'Thisfga'ging means isinclusivefof a vertically'disposed barorimem lloer 5h54 which is1securedftothe 'frame i12 floy-` suitable `means `(not 'siiown) the -lower portionfo'f .the loarloeingfformed With a` projectingfledgel upon y*which lis Amounted arsupport |56 Whichlin .-.the vembodiment illustrated is of r-'balllike ccnguration of a size 'f identical ivvith the `supports to isupport Pa .housing |51 .Whichfenclosesxa `micrometer screw |6| terminating :in a .manipulating portion 1558 provided lwith a frusto- .conicalily .shaped `,disc |59. .The .disc '1:59 fbearssa series `of indicia VVand rotation of disc |59 -Izauses `lengthwise movement -o'f ithe l:.inicrometer ifscrew equal fto the measurement indicated by ithe 1in- ,d-icia, theflatter indicating comparatively small .units of fmeasurement, Las Afor example tthou- .sandths of ianinch.

I have `incorporatedmeansiin-the machinexor adjusting the!` grinding vwheel w60 axially, A:notcfnlv fior the purposesrof maintaining xa 0deiinitez-rela.- .tionship .between Lftheggrinding Surfaces thereof and :the 1 template and f-toolfgbit holder but also `'5to f compensate for Wear of ithejgrindingewheel. To this fend, thereis fsecuredi to :the .sleeve f or cylindrical :member #5| azrunner or block 2|.62 ipre'fer- .ably V,of :rectangular conguration which :is :5se- ,cureditossleevehby meansmf screwsfl'63. '.The

` vblock for :runner ,i |62 boredfand tthreadedginf-an axis fparallel :to rthe. -longitudinal .axis of 'ithe spindle 251 :and :adapted to accommodate .a threaded '.memner |64. .flhe :member z |64 isprorvidedratoneendwwith a .tenon :|65 and at zthe aotherzen'dzwith aftenon 166,;the tenon 165 being Amirnaled gior .irotationgin semi-cylindrical regisiering :recesses :formed :respectively .in .frame .member -.-|'.2 :fand;cap.5.5. The itenon 66 of z-.memherwrfsha'ft E64 is sj ournaled in vhousing 13. f :The .runner ;;|162,1as illustrated in Figures 18 and .19, :is :disposed 'for .aslidahle .movement in .a ,substan- Vtially rectangular socketorrecess |10 which also .iaccommodatesgaxworm Wheel |11f|1xedly V'secured upnntheshaftd Spaced'from shaft or .memrher 1.64 iis;a.`shait ;|:12 arranged in -a .vertical pofsition .as illustrated in :Figure 5, thus substantiallyzatzrightrangles'tothe faXis of shaft |64. 'The-shaft |12 -is vjournaled 4in .a .bore incap -55 :andis :galso '.provided :with da :'tenon 13 vvhich is gournaledzina bore vflllfformed in framefmem- :ber 1&2. :Surrounding :the aupper portion of4 shaft a-.lspacingcoliartf15,'.an'd securedtto a'- tenori gi'i integrallvgformed -at the iupper '.portion of -shait all :is .a fmanipulatingor hand Wheel I |11 :which ,is keyed :or .otherwise `fixed upon vshaft itl-2 ato `-rntate therewith, :the hand .wheel ibeing heldin position .by meansofrnut ITI-3. .Thehand zwheel :[11 :is :preferably :provided with A.a crank 0r handle it? 9 zto facilitate -easefof manipulation. fixed :upon the shaft |:1.2.and nienmeshment with the iworrn .wheel 1 L11 iis .anworm |80.

ltfwll .heznoted :from the foregoing description thatfrotation 4'of .liand '-.Wheel A| 1l1 -causes -10- tatncfxshaft ;|'|.2..and .vvorm .180, which in turn rotates .worm #wheel 5|f1f| and 'threaded :member zd to i'move "the Arunner or l'olock 162 longi- .tuolinallyuv :causing .corresponding .longitudinal or :slide-ble movement offsleeve or quill 3'5| Which-.carries with it thezgrinding spindle '51 and grinding:hleelift` '.Itifshould be noted-iromgure ri'itliat they drivingzpulley 69 Fis-.splined for slidable movementxuponftlie;extension 61 vformed upon a fshafti'i. so:thati.reiatively slidacle movementfmay :talvplace-between'the pulley-and extension to permit. relative longitudinal KYmovement of the shaft 51.

Locking .fnieans are provided for VVsecuring the sieeve rand grinding wheel lspindle or shaft 5.1sin-adjusted:position *Z'I'hislmeans is inclusive .bfzailockingonclampingblock|83 as Lshovvn in Figuresf..4.'andif1,"tlie same vseing disposed in a suitable s recess :formed in :the .cap 55. 'Disposed "abovet'hercap 55 is vafitting f|r84 held in place-by suitableescrews H265 whichisbored to receive a .threaded amemirer fiile., ith-e :latter beingr equipped with"aisknuiledtmanipulating knob |'61:as shown .in Eiguresoeiandal'1 ".'lhu-stpressure iforffrictionally locking .the block it in fengagement with 4sleeve .3% iV may fthe @obtained vlov manipulating the .threaded rmember stat .Tin one f direction, ..and $release aofi-the locking action lof block 83 may be obtainedihyqrotatingftherscrew |86' in the opposite direction.

- rPhe atonl bitiand template holders or fixtures and ,f grinding :Wheel sdressingfmeans avvill be described:inrconnectiontwitlntiie statement of voperation -zof the :machine `rlille :operation `Land ifunction .of the Imachine .offmyiinvention'in dressing 'or ftruing the grinding fwheel :and Vity-:producing '.-a :master template from `Tamaster.tool Adoit".coniiguration:will now' be explained. Figureslidfand 8`fillustrate-several operations performediupon stheimacliinefof my invention. r

First, when it is desired to pre-form a template Y,

from a master tool bit configuration, it is desirable to properly dress or true up the grinding surface of the grinding Wheel to establish the proper relationship of said surface with respect to a straight edge or gaging ysurface and a support. Figure 6 illustrates the operation of presetting of a grinding Wheel dressing tool in a holder or iixture |90, The holder |99 is provided at its lower extremity with a portion |9| formed with a suitable semi-spherically shaped socket adapted to fit over the ball-like support |56 carried by the ledge |55 formed on bar |54. vThe gaging means is formed with an abutment or straight edge |60 which is adapted to be engaged by a cylindrical bar or abutment |92 carried in a laterally projecting portion |93 of the'holder |90. The micrometer screw |59 is set in zero position so that the face of portion |58, the face of abutment |60 and the center of support |56 lie in the same plane. With the socket |9| of the holder |99 in engagement with ball support |56 and gaging member |92 in contact with the gaging face of Yabutment* |50, a. member |94 carrying at its tip a 'Wheel dressing diamond |95 is adjusted with respect to the holder until the tip of the Wheel dressing member |95 engages the frontal face of member |58, after which the locking screw |96 may be drawn up to lock the .member |94 in adjusted position.

After the above described gaging operation for obtaining the proper setting of the wheel dressing diamond |95 is completed, the holder l|90 is placed with the socket portion |9| thereof in engagement with a ball-shaped support |98 ,which is carried in a boss portion |99formed onY the bottom or base 200 of the chamber 34, this position of the holder being illustrated in Figure '1, The straight edge or abutment |50 of y the supporting means |01 is adjusted by meansV f; of the adjusting knob ||9 and index arm |24 vuntil the abutment face is in vertical plane passing through the Vcenter of the ball-like support |98. In the embodiment illustrated, the index |23 is in registration with a Zero indicia on the gaging cylinder |22 as shown in Figure 12, when the center of ball-support means |49 is in .a vertical plane passing through the second ball- 'support |98. By elevating the index arm |24 and then rotating the manipulating knob ||9 until the graduation of the indicia |22 indicating tendegrees is in registration with the index line |23, the supporting means |01 will be moved to a position as shown in Figure 7 with the face of the straight vedge* |50 in a vertical plane passf Ying through the center of the ball-like support |98. ,Ihusybypositioning the holder |90 in the 'position shown in Figure 7 with the cylindrical gaging block |92 in contact with the straight edge l|50 formed on the supporting means |01, the wheel dressing member |95 is ina position to properly dress or true up the grinding wheel. This is accomplished by releasing the-grinding wheel locking means |83 (see Figure 4) and ro-` tating the' hand wheel |11 which. through the medium of gearing |1| and |39 eifects a longitudinal movement of the grinding wheel spindle 51' and hence the grinding wheel l5|). The grinding wheel is adjustedforwardly until the face 64 thereof is in a position to be brought into engagement with the wheel dressing diamond |95 as shown in Figure '1. The grinding wheel supporting spindle 51 and associated mechanisms are locked in, position by means of the block or shoe |83 'through the manipulation of the knob lo |81, after which the holder carrying the dressing diamond is oscillated transversely of the machine with gage block |92 in contact with the abutment or straight edge |50 until the dia'- mond |95 has effectively dressed the face 5.4 of the grinding wheel. When the abrasionof the wheel ceases under the application of the dressing tool |35, the face of the grinding wheel then lies in the plane passing through the face or straight edge |50 and through the centerjo'f the ball support |98.

The grinding wheel is now in a position'without further adjustment to form a template blank simulated to the form of a, master form tool 4bit from which duplicates are to be produced. To

pre-form a template a master tool bit 200 is v adapted to receivea block 222 which is channeled to accommodate a tool bit blank or tool bit, 'the block and tool bit being locked in position by means, of a cam-223 pivoted about a pivot pin 224 and actuated by a threaded member 225 in engagement with cam 223, the threaded member having manipulating knob 225 to facilitatemanipulation of thev threaded member 225, as Ashown 'in Figure 2. The block 222 in direct' engagement with the tool bit blank or tool bitis secured in the holder in proper position by means of a'set nscrew 221.

A template blank 204 is secured to a padportion 205 formed upon the opposite end of lthe holder 20 the template blank beingheld'in position by a clamping means 205 Which may be drawn into engagement with the template blank. With the holder mounted upon the gaging means the master tool bit 200 may then be adjusted'in holder 29| to establish the proper relationship between the nose or cutting end of the master tool bit 200 and the template blank294 so as to properly reproduce the configuration of the toolbit in Simulation on the template blank. The holder 20| is then transferred and mounted in the position as shown in Figure 2 with the socket por.- tion in engagement with the ball support |98, vand the cutting end or nose of the master tool bit 200 lin engagement with the straight edge |50 on the supporting means |01 so as-to bring the template blank 294 into engagement with the face' 64 of the grinding wheel. The holder 20 isthen oscillated and rotated about-the center of the ball support |98 until the coniigurationof the nose end of Vmaster tool bit 200 is reproduced on lthe template blank 204through engagement'of` the latter with the face of the grinding Wheel. It should be noted that in the present embodiment of my invention, the template is twice as far from the center of the ball supportv 98 as the cutting or nose end of the master tool bit 200` so that the resulting conguration on ,the template blank- 204 will simulate the configuration of the cutting-end of the form tool bit and twice the fsize thereof. This is Van important factor as in Ysubsequent forming of tool bits or re-grindingof Worn tools, A.theY accuracy of grinding is-.,;greatlyenhanced `through atemplate or` pattern confgur'ated toa :larger size than the conguration ofthe master :gaseosa iPreparatory 1:to :initially :forming a 'tool hit blank -,into .fa finished configuration tit is .-.neces- :to -zdress -the ggrinding wheel .-in :the zone .the wheel, -that is engaged by :the toolfbit blank. ,To this kend, -a dixture or .holder L2.11! -as .shown :in :Figure 9, 'hauing .aldepending portion 2M iormed `with .a semi-spherically .shaped socket `to -t over :the :ball support L56 of -the gaging means, `is lalso formed at its Aupper end with a .pad `portion C2-,12 itted with :a cylindrical ,gaging :bar 213. The micrometer screw member 1:58 is .set in initialor .zero position when engaged .by lthe `abutmeninl 13 carried .by .the ,holder ..21f1l. In .this position, 1a grinding wheel :dressing `diamond ,-21.4 carried by 1an adjustable supporting .member 2-115 .mounted .in .holder 2.130 is ladjusted longitudinally .until ithedressingdiamond .2-.14 engages the aging .tace orfstraightledge .L60 carried by the1bar L54. :After `thedressing diamond is adjusted .to :propergposiltion, the .sameis retained inadjusted Ypositionlay ia locking ,screw 21d. The holder 251.0 is ,then .transferred Ato Lthe position indicated Figure .7110 with 'theqsocke'tin portionll I .fitting ,over the ,snnport '14.9, .with .the rgaging Abar 42`13 .engage- ,ment with the straightedgeorsurface '15.1 .formed ion thenppenextremityof .theadjustable supporting means 1.0.1. .As will yhe ,noted :in Figure 1.0, theadliusting means -Ifl has been Ainoued or .adinsted by imanipulation of index ,arm .124 and manipulating .-knob :1.19 to ,rotate :pinion 115 :enmeShed withthe .tooth portionof means i955 .until n'ticle .graduation Lon .the .indicia i122 ,registers ,with the .index .L23 corresponding to :the .angle ,of .re- Ailief to rbe .formed .upon a `tool `bit blank ,21:9 `as 1shown..in..l3gure ill. ,Thus if fa :tendegree angle for the vnose end of the tool 11B ,is ..des`ired, `the graduation of the indicia 122 indicating LILO .degrees is .moved into registration with .the .index .123 on `the index arm 1.124. Aterproperaangular .adjustment has `heen Amade for .the tool :supportj 4ting-means `11H ,and thelsaid means securelylocked iDipDS/tin =by cam ,1540 xinto engagement with the :shoe i136 through'manipulation of Nthe `operating llhandle l141', `the grinding `wheelill lis then Iadjmsted forwardly [by releasing the .brake .fshoe 2183 (see Figure 4) and manipulating .the rhand wheel 1,151 to advance thegrinding wheel toward .fthe dressing diamond 12&1 4 to bring the wheel vinto engagement with the ydiamond fas .shown in .ligure ILO. The grinding wheelis ,then -lockedrin @position by manipulating Lthe dinger piece 47.851 itu ifiiictionally `urge v.the :brake .fshoe sI-* .to lock Sleeve i5 1 :and .hencegthe spindle ed? :and grindeiug .wheel f6.1) xfin :adjusted igposition, after which fing wheel .face ,so :that the dressing diamond .2-14 s bro11ght v:into :engagement with .all `portions of ithegr-indng Wheela'ce yuntil the abrasion of the Wheel @or truingof same .is :accomplished 'The tool holder :20:1 is fthen yprovided 4with ya itoolht :blank :2&9 as :shown znEigure 11 which `:is mounted :in the tool holder, fthe ilatter placed 'nponthe ,support i1l5i :of the gaginjg 4means and (the incise :end Iof ithe tool bit -blank 22:1;9 brought iindo fengagement with ,the surface for straight 12 Lof :a tool bit iblankzor fromga Worn .tool bit :to be .re-conditioned or fre-congurated, Ithe gage 155 is mowed, through ',rotationvof member 58, to indi- :cate :ten fthonsandths lof an inch. The tool -tbit blank 21:9 .is .adjusted Vwith .its cutting edge or .cutting-.end:inengagement with the straight edge ,1160 so as Lto pre-determine the proper Vrelation- ;ship between .the template 4and the support :M9 ifto produce the proper coniiguration on :the `tool .=bit. 1The=11older .2.01 is -then transferred into enggagement with the :ball vlike vsupport 14%! carried .by-the 'supportingmeans 1.0.1 and the Vworking or :nose end of -the toolloit blank uponwhich a coniigurationfis to be `formed ris-hroujght into engagezment with Athe grinding wheel face v54 -as `shown :in 4Figure =1'1. The :holder 231 is -oscillated and rotated 4about vthe ball-like support V149 Auntil all partsfof`thenose end Lof the -tool blank 219 have fbeen :.congurated Jay :abrasive 'engagement with Y atne grinding wheel, this action @continuing until fall aportionsiof the .configurations-of the template :A204 engage the straight edge .-1 51 and all abrasive faction vneases betweenvthegrinding -wheel 'and -the tool ybit `lola-nk 219, thus indicating -tothe operator that the :iin-ishe'd :tool :bit Afconliuration has been formed.

I-It .fsh'ould :be noted that the .supporting Ymeans -10:7 and `i118 areof identicalconstruction,` and r'that the templates may :he formed .or the -tools lground at either of thegrindingzzones or 94 byplacing :thetoolholderson thefsupportingmeans lilfloron fsupporting means 1Hi8. When theftoolholder supporting zmeans 10B iis .utilized the .grinding vwheel is :rotated Iin `the opposite direction Eicyrreversing fthe directionfof'rotationrof:the motor-83. This will fa'lsofeffect a reversal fo'f direction of Yrotation of Ythe pump -rotor "28, butthe `pump '25 is lof a `construction 'to deliver duid 'through tube '-29 and "31 `to `the grindingrwheelirrespective o'f `the direction `of yrotation offthepurnp rotor. It shoul'dfbe noted *that `when grinding is to be carried lon 'in the "grinding 'zone 193 the coolant 'or uid diverting vane "f90 is positioned as Ishown in broken Vlines 'in Figure 1. `-Whengrindingisto be performed Aupon the right v4hand 'side of jthe .grinding ywheel "in zone "9'4 'as AViewed V"in Figure `1 vbyoutilizing the tool bit supporting means r'1118, the `coolant uid should be Vdiverted to Lthe kgrinding .zone "9'4 by manipulation `of vthe 'knob 1102 to .reverse the .Aposition o'f the vane .101i .into engagement with the .abutment 198.

lhrough the provision of .dualgrinding stations and through ythe employment of two tool bit holder supporting .means 101 `and .17118,.said `supporting means .may be .selectively adjusted for orrningitools `of .different .angularities .of .relief Aor iclearance, thus facilitating :the variety .of V.work lthat ,may ,be performed on my machine without the necessity nof re-setting .a Supporting :means .with :the .formation or Are-,sliarpening of #each tool bit. .Thus,.-a ftool 'bitmay be ground '-uponrsuplporting .mea-ns 101 wherein .the `relief angle may .be ten degrees -for such tool abit, .and lanother ytool vbit of ydii-ferent angularity :ma-y =be kground upon .the opposite grinding zone of the wheel; 'The 4.only adjustment ,of :the vmechanism to -utilize `either of the .grinding vzones f93 :and x94 :is to .rerIerse the .'motor 1B-3 through :suitable relectrical .switching :means mot shown) and changing the position of lcoolant fuid .diverting wane imi.

It is :apparent iwithinithe lscope .of the invention, modifications :and dierent farrange= :ments may be Inadez'other ithan is .herein disiclosed, V4and the .present :disclosure illustrative spaanse i 13 merely, the invention comprehending all variations thereof.

I claim:

l. In a grinding machine, in combination; a frame; a grinding wheel journaled for rotation on said frame; .a pair of laterally spaced semi- `annularly shaped members adjustably mounted upon said frame for movement about a horizontal axis; a ball shaped element mounted Yupon each of said members; each of said members being formed with a toothed rack portion; pinions engageable with said rack portions for adjusting the relative positions of lsaid members; a pawl and ratchet mechanism for indexing each of said members; means including clamping shoes for securing said members in indexed position; manually operated cam means for moving said shoes to, clamping position; the ball shaped elements on said semi-annularly shaped members being arranged to support tool and template holders during tool grinding operations. d

2. In a grinding machine for grinding form tool bits, in combination, a grinding Wheel journaled for rotation on said frame; a pair of laterally spaced semi-annularly shaped members mounted upon said frame and selectively adjustable about a common axis; a ball shaped element carried by each of said members; said members adapted to support holders whereby form tools carried thereby may be brought into engagement with the uniplanar surface of the grinding wheel; manually operated means for selectively adjusting each of said supporting means; manually operated means for locking said members in adjusted position, means for adjusting the grinding wheel axially whereby the uniplanar surface thereof is movable into coincidence with the axis of adjustment of the semi-annularly shaped members.

3. In a grinding machine, in combination, a frame; a grinding Wheel journaled for rotation on said frame; a pair of laterally spaced tool holder supporting members of semi-annular shape; said members being mounted for adjustment about a common axis; means for selectively adjusting each of said mem-bers about said axis; the axis of said members intersecting the axis of rotation of the grinding Wheel; a straighty edge provided at one end of each of said members; a b-all shaped element carried adjacent the other end of each of said members and adapted to support tool holders; the center of said ball shaped element and said straight-edge on each of said members being on a line passing through the common axis of adjustment of said semiannular'y shaped members; means for adjusting the grinding wheel longitudinally of its axis to bring a uniplanar surface thereof into coincidence with the common axis of adjustment of said members whereby the edges of tools carried by the tool holders engage the grinding Wheel substantially at the intersection of a plane passing through a ball shaped element and straightyedge with the common axis of adjustment of said members.

4. In a grinding machine, in combination; a frame; a grinding wheel journaled for rotation on the frame; a tool holder supporting means including a semi-annularly shaped member adjustably mounted upon the frame; said member having a ball shaped projection formed adjacent one end adapted to be engaged by and to properly position a tool holder on said ball shaped projection; a straight-edge formed at the other end of the member; said semi-annularly shaped member being arranged for arcuate movement about 14 an axis disposed in a horizontal plane Apassing through vthe axis yof rotation of the grinding Wheel; the center of the ball shaped projection and the straight-edge lying on a plane intersecting the axis of adjustment of ksaid member wher'by engagement of a tool carried by a tool holder With a uniplanarisurface of the grinding wheel is effected at said intersection; means for adjusting and locking said semi-annularly shaped member in adjusted position; means including a gear; said semi-annularly shaped member being formed with a serrated surface adapted to be meshed with said gear; and indexing means for determining the relative angular position of said tool holder supporting means with respect to the uniplanar face on the on said frame; a pair of semi-annularly shaped members adjustably mounted upon the frame for `movement about a common axis of curvature of said members; means for adjusting the grinding Wheel longitudinally of its axis of rotation to bring the grinding face of the wheel` intocoincidence with the common axis of curvature of the semi-annularly shaped members; means for locking the grinding Wheel adjusting means in adiusted position; a ball shaped element mounted upon each of said members: each of said members `being formed with a toothed portion; pinions enmeshed with the toothed portions for adjusting the members about their axis of curvature; means for selectively securing said members in adjusted position; manually operated means for actuating said member securing' means; the ball shaped elements being adapted to support tool and template holders during tool grinding operations.

6. In a grinding machine, in combination, a frame: a grinding wheel journaled for rotation on said frame; a semi-annularly shaped member adiustab-ly mounted upon the frame for movement about the axis ci' curvature of the member; means for adjusting the grinding wheel. longitudinally of its axis of rotation to bring the grinding` face of the Wheel into coincidence with the axis of curvature of the semi-annularly shaped member; a ball shaped element mounted upon said member; means including rack and pinion mechanism for adjusting the member about its axis of curvature; indexing means for determining the relative angular position of adjustment of said member with respect to the frame; means for securing said member in indexed position; manually operated means for actuating said member securing means; the ball shaped element being adapted to support a tool and template holder during `tool grinding operations.

'7. In a `grinding machine, in combination, a frame; a'grinding Wheel journaled for rotation on said frame; a pair of semi-annularly shaped members adjustably mounted upon the frame for movement about a horizontal axis; means for adjusting the grinding Wheel longitudinally of its axis of rotation to bring the grinding face of the wheel into coincidence with the horizontal axis of adjustment of the semi-annularly shaped members; a ball shaped element mounted upon each of said members; each of said members being formed with a toothed portion; pinions enmeshed with the toothed portions for adjusting the members about the horizontal axis; indexing said adjusting massima frameg, means, includingv clamping shoes., for se-lcuring sadnmembersf .infV indexed; position; man` ua'llygoperated meansfori actuating,- sact clamp A ingfshoes; the-ball shapedjelementsbeing adapted towsupgortA tool-and.- template holders duringtool' grinding.operations;`

8:-Ina.I grinding` machine, in. combination,- a frame; agrindingwheel journaled for rotation om saniv frarneiv a semi-annularly shaped memben adjustably-mountedsupon the frame. for moverment abouti the',v axisVl of-vv emvatu-re4 of thefmem-` ber;;, meansn forA adjusting the grinding. Wheelf iongitudinally-'of` its axisofarotationv tobring the grinding face off. the Wheel into conincidencewith the axis of eurvature of the semieannularly shaped member meansrfon. locking the ,grinding wheel:againstlongitudinal;movement in aol-justeclk position;V ai ball: shaped4 element mounted. upon saidmembera; said member- Ybeing formedwith toothed portion; a Ypinion, enmeshed W-iththev toothe-lportion for.v 'adj listing thev member about: its' axisfof curvature; indexing means-for determining. the relative posi-tionf of arcuate adjust- 25 Number ment of@ said-memberWith-respect to thev frame;

16 a; clamping shoev for securing@ said member in indexed position; manually operatedcamm'eans for actuating said clamping shoe; the ballshap'ed elementlbeing adapted tozsupport atool andltemplate. holder duringf tool; grndingoperationsa,

EDD. C. OLIVER...l

TheA following references are of record' inl the o1"- this patent:

UNITED- STATES PATENTS Number Name Date 213,807 Carlisle i Apr. k13.1879v 1,831,863 Irwin- VNOV. 17, V1931'V 1,908,476 Earl May 9; 1933 1,929,960 Tebbe YO'G'J'.` 10;1933 2,091,173 Zeitz etal.' May 14,1935 2,021,602 Jackson Novv 19'; 1935' 2,231,21".l Oliver Feb.- 11,1941 2,292,229 Krueger Augi 4;'--1942- 2,375,620v Bura` May 8j 1945 TOREIGN PATENTS Country Date"4 186,223 Great'Brtair-l Sept-28", 1922" 

